[PATCH] Fix ESC key handling in Save dialog.

[Dirk Hohndel]

Sergey Starosek <sergey.starosek at gmail.com> writes:

> Closing unsaved dive raises Save dialog with Yes/No/Cancel buttons.
> Pressing ESC dismisses dialog without saving changes.
>
> This commit adds GTK_RESPONSE_DELETE_EVENT response code check in order
> to fix that behavior.

Thank you.

Pushed

/D